The invention discloses a meat grinder which comprises a main grinder body and a grinding cylinder. A bottom shell is installed on the lower portion of the main grinder body. The bottom shell is provided with a containing groove and a locking control device, wherein the containing groove is used for containing a cutter storage box, and the locking control device is capable of locking the cutter storage box in the containing groove. The cutter storage box can longitudinally slide from back to front to be inserted and locked in the containing groove. The rear end of the cutter storage box is provided with a press part. The cutter storage box is further provided with a hook, an elastic abutting surface and pushing cooperation surfaces. The locking control device comprises an ejecting mechanism which corresponds to the elastic abutting surface and moves longitudinally, a locking mechanism which corresponds to the hook and moves transversely, and a pushing mechanism which corresponds to the locking mechanism and moves longitudinally. The cutter storage box is inserted into the containing groove and pushed from back to front, then the pushing mechanism is locked in a front position and pushes the locking mechanism out, and the locking mechanism is in hook joint with the hook so that the cutter storage box can be locked in the containing groove.